Pump



P. A. GIMNARD.

PUMP.

PPPLICATION FILED OCT 22, i920.

1,409,097I Patented 'Miu'. 7, 1922.

@m @mi PATENT.. oFF-ICE.

PAUL ANDR GUINARD, 0F PARIS, FRANCE. l

PUMP.

Specication of Letters Patent.

Patented Mar. 7, 1922.

Application 1ed 0ctober 22, 1920. Serial No. 418,768.

To all whom t may concern:

Be it known that PAUL. ANDR GUTNARD, a citizen of the Republic of France, and a resident of Paris, 122 Rue de. la Boetie, Seine, France, has invented certain new and useful Improvements in Pumps, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to carry 'out the same.

rlhis invention relates to improvements in rotary pumps of the piston type.

The known pumps of this class are con- Stituted by a cylindrical body or rotor which is rotatable within an outer casing provided with suction and delivery necks. Suitable cavities provided in said rotor contain pistons disposed to cooperate in pairs and ro.- tatable about a shaft eccentrically disposed with reference to the shaft of said rotor.

' The pump may be actuated either by means of the rotor shaft or the shaft which is eccentrically disposed with reference to the pistons. By reason of this combination, said pistons will move within the sockets thereof during the rotation, and will give rise to capacitles or chambers whose volume varies from zero to a maximum and again returns to zero, and these variations in volume are used to effect the suction and delivery of the pump.

In the pump, according to this invention,

the various parts thereof have been combined in a novel manner, whence will result a minimum size for the pump, and the members thereof will operate in a rational manner, while the liquid stream is drawn in and 4delivered with continuous action and without interruption of the same.

The followingr description together with the accompanying drawings shows a constructional form of the pump according to this invention.

Fig. 1 is a longitudinal section.

Fig. 2 is a cross section on the line X-X F ig. 1.

Fig. 3 is a cross section on the line Y-Yl Fig. '1.

The outer casing of the pump is shown at 1, and it comprises a suction neck 2 and a delivery neck 3. One of the end portions 4 is integral with said casing and the other end portion 5 is secured thereto by bolts. The rotor 'of the pump comprises two end portions 6 and 7 connected by four sectors 8, and the spaces between said sectors serve to contain the pistons The pistons which have a rectangular section are shown at 9, 10 and l1, 12, these bemg disposed in pairs and connected at the ends thereof, the pistons 9, 10 being con- 'nected by a cross piece 13 and the pistons 11, 12 by a cross piece 14, said cross pieces being cut away to give passage to the actuating shaft 16.

The rotation of said pistons is effected by a cross-shaped member 15 the four arms whereof are in contact with the inner sur faces of said pistons and are transversely slidable thereon. The rotary movement is transmitted to said cross-shaped member 15 by a shaft 16 upon which it is secured by the key 17, said shaft 16 being actuated from the exterior by any suitable means, for instance, by an electric motor.- The rotation of the pistons effects the rotation of the sectors 8 Secured to the rotor of the pump.

The shaft 16 is mounted eccentrically and with easy friction within two long sleeves 18, 18 serving as bearings for said shaft, and said sleeves are mounted concentrically with easy friction within the sockets 19 and 20 forming extensions of the end portions 6 and 7 of the rotor of the pump. T he left hand bearing 18 is provided with a shoulder 21 contacting the end plate 5, and upon the end of said bearing is screwed the oil cap 28. The right hand bearing 18 serves tc maintain the packing member 23 which provides for the tight working of the shaft 16 and is held in place by the end piece 24. @ne end of the sleeve 18 may be provided with a lug 29 adapted to extend withinthc key way slot or groove 30 formed within the end portion 4 of the casing which will retain the sleeve 18 in a stationary position and thereby prevent it from rotating with the shaft 16. The operation of the device is as fellows: The shaft 16 eifects the rotation of the cross-shaped member 15 which actuates the pistons 9, 10 and 11, 12, and these latter actuate the rotor of the pumpv by their Contact with the members 8. ln this movement, the pistons rotate about an axis inplane fr-,

the rotor about an axis in plane 6 6, and

in this manner the rotor is given a diametral movement with reference to said pistons, as well as a movement perpendicular to the diameter which is permitted by the sliding of the inner surfaces of said pistons upon the and actuating devices.

10 takes the vpable of cross-shaped member. If the rotation is supposed to take place in the sense of the arrow F, the piston 9 Will take the place of piston 11 and at the end ol' a half revolution it will take the place of piston 10, While the piston lace of piston 12 and finally of piston 9. ll'he corresponding capacity of the outer face of piston 9 is zero in the rst place and then reaches a maximum when piston 9 takes the place of piston 10, and this maximum capacity will return to Zero when said piston continuing its movement in the sense of the varrow shall return to 9. These variations in volume are used to efect the suction and delivery. It will be observed that the suction and delivery necks are provided on the interior with suitable recesses 25 and 26 for maintainingr the desired conimunication and the pistons.

Manifestly7 the construction shown is caconsiderable modification and such modiiication as is within the scope of my claim, I consider Within the Spirit of my invention.

Having now described my said invention and the best means I know for carrying the 'slidable piston arranged between each, a pair of adjacent sector members,4 said pistons being connected in pairs, a cross-shaped member fixed to said driven shaft, the extremities of the arms of said cross-shaped member be-v ing arranged in sliding contact with the interor faces of said pistons, and said casing having an inlet and outlet port.

In Witness whereof I have hereunto set my hand.

PAUL ANDR eUiNARD. 

